Vent for shipping-cans



DNA. LISK & T. D. BROWN.

VENT FOR SHIPPING CANS. No. 476,281. Patented June @1892.

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UNITED STATES PATENT OFFICE.

DAVID A. LISK AND TRISTRAM D. BROWN, OF CLIFTON SPRINGS, NEW YDRK.

VENT FOR SHIPPING-CANS.

SPECIFICATION forming part of Letters Patent No. 476,281, dated J n ne7, I892. Application filed January '7, 1892. Serial No. 417,286. (Nomodel.)

To aZZ whom it may concern.-

Be it known that we, DAVID A. LIsK and TRISTRAM D. BROWN, citizens ofthe United States of America, residing at Clifton Springs, in the countyof Ontario and State of New York, have invented certain new and usefulImprovements in Vents for Shipping-Cans; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters of reference marked thereon, which form a part of thisspecification.

This invention relates to improvements in vent-closures forshipping-cans.

The object of the invention is to provide a shipping-can with a cheapand effective device forming a vent which will be automatically closedwhen the can is swung within the case and opened when the can is swungbeyond the case in pouring the contents thereof; and the inventionconsists in providing a can having a vent-tube with anupwardlyprojecting portion with a flexible tube, which is secured tosaid upwardly-projecting portion and adapted to contact with the caseand close the vent-tube, as will be hereinafter fully set forth, andparticularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a perspective view, partly broken away to better show theconstruction of the vent-closing device. Fig. 2 is a sectional view.Fig. 3 is a detail View showing the flexible connection in a differentposition on the end of the venttube.

A designates the packingcase, which is of ordinary construction, and Bthe can, which is pivotally secured therein, 1) being thedischarge-spout.

C designates the vent-tube, which is secured to the can and follows theshape or contour of the body thereof, one end a of said .venttubeleading into the can, While the other end (1 projects upward therefromat a point nearly on a line with the pivots by which said can is securedto the packing-case. To this upwardly-bent end of the vent-tube O issecured a section or piece of rubber tubing 6, which projects asufficient distance beyond the end d of the vent-tube to contact withthe top of the packing-case when the can is turned upon its pivot, so asto locate the spout therein, and by contacting with the top of thecasing, the vent-tube 6 being soft, pliable, and compressi ble, it willmake a tight joint and prevent leak or escape of gas from the interiorof the can. If a comparatively short tube is used, the upper end willonly be slightly bent and compressed, while if a long tube is used, asshown in Fig.5 3, said tube will be bent over so that the ends will becompressed to close the same. This inethod of closing the vent of thecan is extremely simple,.a,ud it will be readily observed that as soonas the can is swung to withdraw the contents the closure will beautomatically opened and air permitted to passinto the can. Anotheradvantage of such construction is that should at any time gas accumulatein the can and reach a high pressure, said pressure will be sniiicientto open the vent. Thus the construction forms not only a closure for theven t, but also a safety-valve.

The vent-tube O is curved to conform to the shape of the can, preferablybeing in part the segment of a circle, so that its inwardly-projectingend will be at the top of the can when the spout is lowered.

Having thus described our invention, we claim 1. In combination with apacking or ship-' ping case A, a receptacle pivotally secured therein,said receptacle having a vent-tube with an upWardly-projecting end, towhich a rubber tube or hose is secured so as to abut against thepacking-case and form a closure for the vent-tube, substantially asshown.

2. In a packing or shipping case, a casing A, inclosing a receptacle B,a tube O, secured to the receptacle and provided with aninwardly-projecting end and an upwardly-pro j ecting end, and a flexibletube secured to the u pwardly-projecting end so as to abut against thetop of the casing A and be bent by such contact, substantially as shown.I

In testimony whereof we affix our signatures in presence of twowitnesses. DAVID A. LISK. TRISTRAM D. BROWN. Witnesses:

T. J. LIsK, J OHN S. ANDREWS.

